In what way was Marxism different from the socialism advocated by Owens and Fourier?

AOwens and Fourier believed that the working masses were being exploited by Capitalism.

BMarx described a system where the bourgeois capitalists were the tools of revolution.

COwens and Fourier thought that the capitalist system would bring about revolution.

DMarx advocated the use of utopian communities and social reforms to create a classless society.